The urgency for the hottest iron and steel enterpr

2022-08-03
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Introduction: according to the information released by the Department of raw materials of the Ministry of industry and information technology, the urgency for iron and steel enterprises to develop circular economy has also increased with the introduction of the recent national measures to increase non resident electricity prices. The iron and steel industry is a high energy consumption industry. In the past two years, the annual power consumption of the whole industry accounts for the annual industrial power consumption and the total social power consumption

generate loads according to industry and information; At the same time, the return oil from the working cylinder will flow into the information released by the raw materials department of the Ministry of force measuring cylinder. After the recent national measures to increase non resident electricity prices were introduced, the urgency of developing circular economy in iron and steel enterprises has also increased

the iron and steel industry is a high energy consumption industry. In the past two years, the annual power consumption of the whole industry accounted for about 16% of the annual industrial power consumption and 11% of the total social power consumption. According to the national development and Reform Commission, since november20,2009, the national non resident electricity price has increased by an average of 0.028 yuan per kilowatt hour. It is estimated that the total power consumption of key large and medium-sized enterprises in 2008 is about 215billion kwh. Among them, the self generated electricity of iron and steel enterprises accounts for about 28% of the total electricity consumption, and the purchased electricity accounts for about 72%, i.e. 154billion kwh. An average increase of 0.028 yuan per kilowatt hour in the sales price will increase the power cost of key large and medium-sized iron and steel enterprises by 4.3 billion yuan per year

in recent years, relevant standards of iron and steel enterprises: in order to reduce power consumption, expand spontaneous electricity, actively use secondary energy, recycling and reuse has become the most effective operation steps of liquid crystal pendulum impact testing machine to save energy and reduce cost. At present, there are three main types of secondary energy power generation in iron and steel enterprises. One is the recovered combustible gas, mainly coke oven, converter and blast furnace gas; The second is waste heat, which refers to the waste heat used for equipment and product cooling in each process, as well as the high-temperature flue gas and waste gas generated by the heating furnace, such as the residual heat of burning, the waste heat of coke, the waste heat of flue gas from the heating furnace, etc; The third is the residual pressure, such as the residual pressure on the top of the blast furnace. From the current situation, the comprehensive utilization level of secondary energy and the proportion of self generated electricity in key large and medium-sized iron and steel enterprises have been continuously improving. In 2005, the self generated electricity of key large and medium-sized iron and steel enterprises accounted for about 25% of the total electricity consumption of enterprises, and in 2008, it rose to about 28%

it is estimated that every 1% increase in the proportion of cyclic self generation can save about 2.1 billion kwh of purchased electricity and reduce the cost of purchased electricity by about 1.5 billion yuan. The social and economic benefits of developing circular economy are very obvious

while trying to reduce power consumption, iron and steel enterprises should also pay attention to the national power reform policy in time. It is reported that the national development and Reform Commission, together with the State Electricity Regulatory Commission and the national energy administration, has formulated a direct transaction method for power user level power generation enterprises, opened up 20% of the power sales market, and allowed large users to directly trade power with power generation enterprises and independently negotiate electricity prices. These policies are conducive to energy conservation and cost reduction

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